0x01
SPI Slave mode
0x02
SPI Master mode
SpiRateSel
- this parameter sets the SPI master mode clock rate:
Setting Mode
0x00
125 kbps
0x01
250 kbps
0x02
500 kbps
SpiOptions
- this parameter allows the SPI to be configured with the following options:
Setting Option
0x00
Leading edge rising, sample leading edge, MSBs sent first
0x01
Leading edge rising, sample falling edge, MSBs sent first
0x02
Leading edge falling, sample leading edge, MSBs sent first
0x03
Leading edge falling, sample falling edge, MSBs sent first
0x04
Leading edge rising, sample leading edge, LSBs sent first
0x05
Leading edge rising, sample falling edge, LSBs sent first
0x06
Leading edge falling, sample leading edge, LSBs sent first
0x07
Leading edge falling, sample falling edge, LSBs sent first
SpiMasterCmdLen
- this parameter sets the length for the SPI master command string that will be used to interrogate the
slave peripheral, when SPI master mode is selected with periodic I/O reporting enabled.
SpiMasterCmdStr
- this parameter holds the SPI master command string that is used to interrogate the slave peripheral
when SPI master mode is selected and periodic I/O reporting is enabled.
7.4.5 Bank 0x04 - Host Protocol Settings
Bank
Location
Name
R/W
Size
Range
Default
0x04
0x00
ProtocolMode
R/W
1
0..1
0 (Transparent)
0x04
0x01
TxTimeout
R/W
1
0..255
0 (No timeout)
0x04
0x02
MinPacketLength
R/W
1
0..255
1 (byte)
0x04
0x03
TransPtToPtMode
R/W
1
0..1
1 (Last RX)
0x04
0x04
MsgsPerHop
R/W
1
1..8
8
Table 7.4.5.1
ProtocolMode
- this parameter selects the host protocol mode. The default is 0x00, which is transparent mode, meaning
the radio conveys whatever characters that are sent to it
transparently
, without requiring the host to understand or con-
form to the DNT90M's built-in protocol. This setting is recommended for point-to-point applications for legacy applications
such as wire replacements where another serial protocol may already exist. Setting this parameter to 0x01 enables the
DNT90M protocol formatting. It is not necessary to define the same protocol mode for all radios in a network. It is fre-
quently useful to configure all radios in a point-to-multipoint network for transparent mode except the base, which should
be in protocol mode. Note that it is possible for the host to switch the radio from transparent mode to protocol mod by
transmitting an
EnterProtocolMode
command, and switching back to transparent mode by transmitting an
ExitProto-
colMode
command.
©2012 by Murata Electronics N.A., Inc.
DNT90M Integration Guide (2012/09/17)
Page 40 of 74
www.murata.com
